Diabolical
Diabolical adjective - Of, relating to, or worthy of an evil spirit.
Stygian and diabolical are semantically related. In some cases you can use "Stygian" instead an adjective "Diabolical".
Stygian
Stygian adjective - Being without light or without much light.
Diabolical and stygian are semantically related. Sometimes you can use "Diabolical" instead an adjective "Stygian".
Cite this Source
Stygian and Diabolical. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/diabolical/stygian
Diabolical & Stygian. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/diabolical/stygian>.
Stygian or Diabolical. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/diabolical/stygian.
Google Ngram Viewer shows how "diabolical" and "stygian" have occurred on timeline